190-01878-02
GMA 342/345 Installation Manual
Rev. 5
Page 1-5
Music Functions
Music inputs (stereo): 2
Music input impedance: 600 Ω (differential)
Music gain: +24dB @ max. volume
Music input level:<200 mVrms for full power* output @ max music volume knob
position (typ.)
3.0 Vrms max music input level
Music bandwidth: 20 Hz to 20 kHz @ full power output
Music distortion: <0.1% THD+N (typ.) @ full power, full bandwidth
*Full power output refers to 65 mW into 150 Ω at the headset
Bluetooth
Connectivity
GMA 345 only
Bluetooth 3.00 Compliant, allows music, cell phone calls, and interface with the
VIRB XE action camera. Bluetooth capability supports HFP (including HFP v1.6
Wide Band Speech mode), A2DP, and AVRCP.
The GMA 345 stores 10 paired devices and overwrites the least recently
connected device when a new device is paired. Only 1 Bluetooth connection
allowed at one time. The VIRB XE cannot be connected when using a phone
(and vice versa).
USB Charge Port
GMA 345 only
USB charge port - Rated for 10 W. The GMA 345 charge port features USB port
detection that will connect the optimum charge rate for the device connected.
The charge port supports a maximum of 2.1 Amp charge current for devices.
The USB charge port will shutdown and protect the GMA 345 for current draw
above 2.3 Amps.
3.5 mm
Front Panel Jack
GMA 342 only
The GMA 342 has a standard 3.5 mm front panel jack for connecting by cable
phones or tablets. The front panel allows stereo music to be played from a
device, and also allows cell phone calls to be made through the GMA 342. The
front panel jack is a 4 conductor jack, allowing either a standard 3 conductor plug
for audio, and also 4 conductor plugs used by some cell phones for phone calls.
For stereo music input, the jack is rated to 1.5 Vrms and has 5 kohm input
impedance.
Marker Beacon
Receiver
Frequency: Crystal controlled at 75 MHz
Sensitivity: LO 1000 μV hard; HI 200 μV hard
Selectivity: 6 dB @ ±10 kHz min, 40 dB @ ±200 kHz max.
Input impedance: 50Ω
External lamp drive: 125 mA max each output
Other outputs: Middle MKR sense
Special functions: SmartMuteTM marker audio muting
Table 1-3 Electrical Characteristics
Characteristic
Specification
